<?php

/**
 * UserIdentity represents the data needed to identity a user.
 * It contains the authentication method that checks if the provided
 * data can identity the user.
 */
class UserIdentity extends CUserIdentity
{    
        private $_id;

        /**
	 * Authenticates a user.
	 * The example implementation makes sure if the username and password
	 * are both 'demo'.
	 * In practical applications, this should be changed to authenticate
	 * against some persistent user identity storage (e.g. database).
	 * @return boolean whether authentication succeeds.
	 */
	public function authenticate()
	{
            $username = strtolower($this->username);
            $user = USER::model()->find('LOWER(name)=?', array($username));
            
            if($user===null) {
                $this->errorCode = self::ERROR_USERNAME_INVALID;
            } else if(!$user->validatePassword($this->password)) {
                $this->errorCode = self::ERROR_PASSWORD_INVALID;
            } else {
                $this->_id = $user->id;
                $this->username = $user->name;
                $auth = Yii::app()->authManager;
                
                if(!$auth->isAssigned($user->role,  $this->_id)){
                    if($auth->assign($user->role,  $this->_id)) {
                        Yii::app()->authManager->save();
                    }
                }
                $this->errorCode = self::ERROR_NONE;
            }
            
            return $this->errorCode == self::ERROR_NONE;
	}
        
        public function getId()
        {
            return $this->_id;
        }
}